If you're looking for a solid roblox remote event tutorial security breakdown, you've probably realized that just making things "work" isn't enough anymore. You spend weeks building a cool shop or a combat system, only to have someone join and give themselves a billion coins in three seconds. It's frustrating, but honestly, it's a rite of passage for every Roblox dev. The problem usually boils down to how your client and server talk to each other.
RemoteEvents are basically the bridge between the player's computer (the client) and Roblox's computers (the server). If that bridge doesn't have a guard at the gate, anyone can walk across carrying whatever they want. We're going to look at how to lock those gates down without breaking your game's performance.
Why Your Remotes Are Currently Broken
Most beginners follow a tutorial that shows them how to fire a remote to, say, buy a sword. The client says, "Hey server, I'm buying this sword and it costs 50 gold." The server says, "Okay, cool," and takes 50 gold. That is the quickest way to get your game ruined.
The biggest rule in Roblox development is never trust the client. If a player can change a value in their local script, they can change what they send through a RemoteEvent. An exploiter can just change that "50 gold" to "-999999" and suddenly they're the richest player in the game. When you're looking at roblox remote event tutorial security, the first thing you have to accept is that the client is a liar.
The Server Must Be the Boss
To fix the shop problem, you don't let the client send the price. Instead, the client should only send the name of the item they want.
Let the Server Do the Math
When the server receives an OnServerEvent signal, it should look up the price in a folder or a script that the player can't touch. If the player wants a "Steel Sword," the server checks its own list, sees it costs 100 coins, checks the player's actual balance, and then decides if the purchase goes through.
Always Check the Player Argument
Every time you use OnServerEvent, the first argument passed is always the player who fired it. Don't let the client pass their own player object as an argument—the server already knows who they are. If you rely on the client to tell you who they are, an exploiter can fire the event and pretend to be someone else, spending other people's money or kicking them from the game.
Sanity Checks Are Your Best Friend
A "sanity check" is just a bit of code that asks, "Does this request even make sense?" If you have a RemoteEvent for swinging a sword, and the client fires it while they're currently dead or sitting in a car five miles away from any enemies, the server should just ignore it.
Distance Checks
This is a huge one. If a player claims they hit an enemy, the server should check the distance between the player and that enemy. If they're across the map, you know something fishy is going on. It doesn't have to be pixel-perfect—allow for a bit of lag—but it should be reasonable.
Cooldowns and Debounces
Exploiters love to "spam" remotes. If you have an event that gives a player a reward for finishing a quest, they might try to fire that event 1,000 times a second. You need a server-side debounce. Don't just put the wait timer in the local script; that does nothing for security. The server should keep track of the last time a player fired that specific event and reject it if it's happening too fast.
Protecting Your Combat Systems
Combat is where roblox remote event tutorial security gets really tricky. You want the game to feel snappy, but you can't let players have total control.
If you're making a gun game, don't let the client tell the server how much damage the gun does. The server should know the damage stats. The client only tells the server: "I fired at this position in this direction." The server then does its own raycasting or hit detection to see if a hit actually happened.
Yeah, it's a bit more work, and you have to account for lag (latency), but it beats having a game where people can "kill all" with a single click.
Dealing with Remote Spammers
Sometimes exploiters don't even want to steal gold; they just want to crash your server. They do this by firing remotes so fast that the server gets overwhelmed.
Rate Limiting
You can set up a simple table on the server to track how many requests a player sends per minute. If they cross a certain threshold, you can automatically kick them or just start ignoring their requests for a while. It's like a firewall for your game.
Descriptive Naming (Or Not)
Some people think that naming their RemoteEvents "X7_99" instead of "AddGold" helps. Honestly? It doesn't do much. Exploiters have tools that show them exactly what's happening when a remote is fired. Focus more on the logic of your security rather than trying to hide the names of your events.
Practical Example: A Safe Shop
Let's look at a quick mental model of a secure transaction:
- Client: Player clicks "Buy Potion" button.
- Client: Local script fires a RemoteEvent called
RequestPurchaseand sends the string"Potion". - Server: Receives the request and the
playerobject. - Server: Checks a ModuleScript for the price of
"Potion"(it's 10 coins). - Server: Checks
player.leaderstats.Coins.Value. - Server: If the player has 10+ coins, subtract 10 and give the item.
- Server: If not, do nothing (or send a message back to the client saying "Not enough money").
In this scenario, there is nothing the exploiter can do to change the price or get the item for free, because the server holds all the important info.
Common Mistakes to Avoid
One mistake I see all the time is letting the client send code to be executed. Never, ever use loadstring() on the server with data sent from a RemoteEvent. That's basically giving the keys to your house to a burglar and asking them to watch the place.
Another one is trusting "State" variables. If the client says "I am currently an admin," don't believe them. The server should check its own list of IDs to see who is actually an admin.
The Performance Balance
You might worry that adding all these checks will slow down your game. Generally, a few if statements and distance checks on the server are incredibly fast. The performance hit is negligible compared to the cost of having a game that's literally unplayable because of hackers.
The only thing that really hits performance is doing massive loops or complex physics calculations every time a remote is fired. Keep your validation logic snappy and efficient.
Final Thoughts on Security
At the end of the day, roblox remote event tutorial security isn't about making a perfect, unhackable game. It's about making it too much of a headache for people to mess with. If you validate your data, check distances, and keep your important logic on the server, you're already ahead of 90% of the games on the platform.
Stay curious and keep testing your own systems. Try to think like someone who wants to break your game—it's actually the best way to learn how to fix it. Keep your server logic tight, don't trust the client, and you'll be just fine. Happy coding!